I feel a nerve/blood vessel is swelled(not visible if cheek is inspected with naked eye) in the inner cheek. But when i touch that with finger and palpate that or touch with tongue too, it feels theres a prominent nerve/vein.. also i have redness and rough surface(feels sour to taste) over the inner cheek when i drew line. Please help me why is it happening...mainly why is there a bulged nerve :(. M worried! Is this any infection? Or is it something else? Also on the outside where i curved the white line near mandible body/jawline, i palpate that and feels that nerve has went from there, i checked with a local gp to check for lymph nodes he checked and all came fine. Note: I don't smoke, drink or eat tobacco. My upper wisdom tooth is coming up on that side. I have buccal mucosa trauma due to sharp cusps maybe.